Manufacturing Test Engineer

  • San Francisco, CA
  • Full-time

Company Description

Square builds common business tools in unconventional ways so more people can start, run, and grow their businesses. When Square started, it was difficult and expensive (or just plain impossible) for some businesses to take credit cards. Square made credit card payments possible for all by turning a mobile phone into a credit card reader. Since then Square has been building an entire business toolkit of both hardware and software products including Square Capital, Square Terminal, Square Payroll, and more. We’re working to find new and better ways to help businesses succeed on their own terms—and we’re looking for people like you to help shape tomorrow at Square.

Job Description

Square’s Hardware Team builds the tangible connection to Square. We started with a simple and elegant Reader that turns any phone or tablet into a mobile point of sale - and we continue to lead this category with advances in chip card and NFC technology. As we introduce more products, we will meet the needs of more and more sellers with stand-out hardware products, globally. Our hardware engineers are responsible for designing and developing world class hardware products. They understand the subtleties of user interaction, robust communication interfaces, and smart product design.

Problems We Work On:

The Manufacturing Test Engineering team at Square is responsible for making sure that the millions of hardware devices leaving our factories are built according to design and meet (or exceed) customer expectations. We’re a diverse group of engineers that use our unique backgrounds to solve challenging problems in our factories. We dabble in electrical engineering, software, mechanicals and data analysis to understand the design intent of our products and understand how we can translate it to scalable test plans. We are Jacks and Jills of all trades, and we thrive on having a deep systems-level understanding of Square’s hardware products.


You will:

  • Become intimately familiar with Square's hardware products and manufacturing processes.

  • Research technologies for our next-generation hardware products.

  • Develop test plans and test-setup prototypes for new technologies.

  • Work with Square’s Devices Software Engineering group to understand embedded test access and APIs.

  • Write and debug test station software.

  • Understand the meaning of the measurements our stations are taking, and feed analysis of these measurements back to our hardware design teams.  

  • Reach beyond the boundaries of Manufacturing Test to make Square’s products better wherever you see the chance.

You are:

  • A recipient of a Bachelor’s degree in Computer Engineering, Electrical Engineering, Computer Science, Mechatronics or related technical field.

  • Experienced working in a technical field for 1-2 years. 

  • Fluent in Python, MATLAB, Labview, or similar programming language 

  • Experienced with hardware lab equipment for test, measurement (e.g. oscilloscope, power supply, DMM, etc.), and/or prototyping (Raspberry Pi, Arduino, 3D printing, powertools, etc.)

  • Familiar with and able to read EE circuit diagrams and schematics.

  • Excited to work on hands-on projects and to make things work in EE, software, and/or ME realms.

  • Enthusiastic to apply methodical engineering problem-solving skills to dig into challenges that are outside of your expertise.

  • Collaborative: have the ability to work as a team, ask questions, and share information to solve problems.

  • Able to effectively communicate technical information to audiences that include members of various levels of technical expertise.

  • Able to meet the international travel expectation (~15%…post-COVID-19 constraints, of course)

Even Better:

  • Experienced performing analog measurements (RF, acoustic, optical, etc.) including calibration and control of systematic errors

  • Knowledgeable in statistics. Experience using SQL, JMP, or similar data program

  • Experienced working on electrical signal integrity in a noisy environment

  • Familiar with electronics manufacturing processes: SMT, FATP

Additional Information

At Square, we value diversity and always treat all employees and job applicants based on merit, qualifications, competence, and talent. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us by sending an email to assistance(at) We will treat your request as confidentially as possible. In your email, please include your name and preferred method of contact, and we will respond as soon as possible.


At Square, we want you to be well and thrive. Our global benefits package includes:
  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Flexible time off
  • Learning and Development resources